Venetian blind slat



July 15, 1952 1 MlAo 2,603,286

VENETIAN BLIND SLAT Filed Sept. l, 1950 IN V EN TOR. 7,7/0 Amas' /V/aPatented July 15,711952 ifomTEoy-STT VENETIAN BLIND sLAT rThomas Miao,Shanghai, China l Application september 1, 195o, sesamo; 182,756 10mm.(c1. 16o-17s) 1 This finvention relates to slats for lVenetian blinds orjalousies and more particularly to slats to be movably mounted by asupporting structure for controlling the passage of'light and airthrough a blind including such slats.

It is among the objects of the invention to provide an improved blind orjalousie slat which will transmit-diffused light at all times, but willobstruct vision through 4a blind including such slats whenever the blindis closed and will obstruct vision through a jalousie or similarstructure in which the slats are iixedly mounted. which will permit afree passage of air therebetween and, Awhen rnovably mounted in a blind,can bemoved relative to each other` to block .such

passage of air, which will obstruct the passage` ofl precipitationthrough a blind 'or jalousie in which they are included, and which aresimple and l,

durable in construction, economical to manufacture, and easy to install.

Other objects and advantages will become apparent from a considerationof the following description and the appended claims in conjunction withthe accompanying drawing wheren "Figure l is an elevational view of aVenetian blind including slats illustrative of the invention;

scale, of one of the slats of the invention;

Figure 3 is a cross sectional view on the line 3 3 of Figure 2;

Figure 4 is an end elevation of a fragmentary portion of a Venetianblind including slats constructed in accordance with the invention; and

Figure 5 is an end elevation of associated slats showing the slats in adierent position relative to each other from that illustrated in Figure4.

With continued reference to the drawing, the Venetian blind illustratedin Figure 1 may be of well known construction having at its top a box orcompartment including mechanism for raising and lowering and adjustingthe blind, this rnechanism being covered by a facia board II'I and beingoperated by depending cords I I and I2 disposed at respectively oppositesides of the blinds. Tape ladders I3 depend from the mechanism includingcompartment behind the facia board ID in spaced apart and substantiallyparallel relationship to each other and a bottom board I4 is secured tothese ladders at the lower ends thereof. A plurality of slats I 5 arecarried by the ladders I3 between the bottom board I4 and the faciaboard I in spaced apart and parallel relationship to each other.

Figure 2 is a top plan view, on an enlarged The root-tom 'board I4together with thsiats I3 may be raised and-lowere'dby oneof the cords,for example, bythe cord? I I, and the ladders may be adjusted to varythetilt or inclination of the slats I3 by the other cord I2.

As Venetian blind structures are generallylold and welly known to theart, a? more d'etaileddescription of the slat supporting and adjustingstructure is considered unnecessary for the purposes of the` presentdisclosure.U While the slats are illustrated in the accompanying drawingas being movably mounted ina Venetian blind structure,.it'isto beunderstood'that they may be fixedly mounted in a suitable frame toprovide jalousies or, shutters without 'in any Way exceeding the scopeofthe invention. q l

The slat offthe present :invention'iisfparticularlyv illustrated inFigures 2 and 3 and 'comprises an elongated, rectangular strip ofsheetmaterial which is thin in proportion to its width and narrow inproportion to its length and has substantially parallel longitudinaledges. This slat is formed of a translucent material, such as a suitablesynthetic resin plastic, so that light will be transmitted therethrough,but vision will be obstructed. The material of the slats may be coloredor tinted, if desired, and the surfaces of the slats may be ornamentedin any desired manner.

Each slat has a corrugation I6 of partly circular cross sectional shapeextending longitudinally thereof substantially symmetrical with themid-width location of the slat. The radius of curvature of thecorrugation I E is slightly greater than one fourth the width of theslat and the corrugation is bordered on the convex side thereof byconcavely curved marginal portions extending one along each side of thecorrugation and having a radius of curvature substantially the same asthe radius of curvature of the corrugation. The distance between a planetouching the concave surfaces of both marginal portions II and a planeparellel to the first mentioned plane and touching the convex surface ofthe corrugation IB is substantially equal to the distance betweenadjacent tapes I8 of a slat supporting ladder I3. and is clearlyillustrated in Figure 4.

With this arrangement, when the slats are in open position with theblind closed, as illustrated in Figure 4, a tortuous or sinuous passageis provided between each two adjacent slats. When the slats are in theiropen position, ventilating air may ow freely in either direction gthrough the sinuous passages between adjacent slats, but vision throughthese spaces is obstructed or essential characteristics thereof".

by the intervening corrugation and marginal portions of the slats. Atthe same time, atmospheric precipitation, such as rain, striking theblind, will not pass through the spaces between the slats into a roomprotected by the blind, but will be deflected by the corrugated portionsof the slats and drain of! of the outer edges of the slats, asillustrated in Figure 4.

When the slats are adjusted to closed condition, as illustrated inFigure 5 the outer marginal portions'of the slats "contact thecorrugated por-A tions of adjacent slats providing a relatively tightclosure between adjacent slats to obstruct the ilow of air through theblind. The slats being formed of translucent material, light will betransmitted through the slats fatall-times'f However, if it should bedesiredtdobstructthe ow of light the slats may be formed of an opaque'and nonreiiective material and mounted inza,

.respects as Y .illustrative and' 'not r restrictive,- the 'scope' otrtheinvention .being "indicated, by' the. appended claim'ratherzthan.bytheioregoing de`- Y scription, and all changes whichcomewithin the-meaningrand range of' equivalency of' the claimsfare,therefore, intended. to vbe embraced therein.

What is claimed is:

A blind comprising a support and a plurality of slats mounted in saidsupport in spaced apart and substantially parallel relationship to eachother, each of said slats comprising a strip of light transmitting sheetmaterial having a longitudinally extending corrugation disposedsymmetrically of the midwidth location thereof and having marginalportions of less width than the width of saidcorrugatiorif-1extending-one along each'sidev of the latter'. saidcorrugation having a radius of curvature transversely of said slat atleast as great as one-fourth of the width oi the slat and said marginalportions each having a radius of curvature transversely of vsaid slatsubstantially" equal to the radius of curvature of said corrugationandhaving their convex side at the same'side of said slat as the concaveside of said corrugation, said slats having their corrugations disposedat the upper sides thereof and being spaced apartl ar distance suchthaty a plane touchingthe-convex` surfaces of both marginal portions ofvone slat is substantially inl contact with the' convex .surface of thecorrugation of the adjacent lower slat.

THOMAS .MIAO.

REFERENCES CITED The following references are of Arecord in vthe le ofthisY patent:

UN'I'IEDv STATES PA'I'ENTS Number Name 1,093,415 HimesV Apr. 14, .19142,118,134 Allison Map24, 1938 2,209,355 Schmitz i- July.30. 19402,300,545v

Gouch; Nov-3,1942

